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Updated: Dec 9, 2025

Atom Probe Tomography Analysis of Exsolved Mineral Phases
Published on: October 25, 2019
Data on phase and chemical compositions of black sands from "El Ostional" beach situated in Mompiche, Ecuador
Karina J Lagos1,2, Bojan A Marinkovic3, Anja Dosen3
1Department of Materials, Escuela Politécnica Nacional, Quito 170109, Ecuador.
Abstract:
Data revealing the phase and chemical compositions of natural black sands from "El Ostional" beach, located in the northern Ecuadorian Pacific coast have been presented. The samples were collected from six points over the shore area of approximately 500 × 40 m2. The data on crystalline phases (iron titanium oxide, orthoclase feldspar and zircon) were determined by X-ray powder diffraction (XRPD), while semi-quantitative chemical analyses of major (Fe and Ti) and trace elements were obtained by X-ray fluorescence spectroscopy (XRF). The phase composition was verified by scanning electron microscopy (SEM), using backscattered electron (BSE) mode and energy dispersive spectroscopy (EDS). These comprehensive data are a contribution to valorize ilmenite-hematite solid solutions from natural resources towards the identification of novel technological applications.
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